A good defense to start your game with! Sent in by [G]Primantis! Thanks!

First build up about 9 scv then when u have 150 minerals send on off to your entrance 2 build a barraks at the choke i mean in the choke point then while it is building send another one up to build another barraks right by it and whenever u have an extra 50 build a scv while they r building take a scv off the minerals and build a depot then when the barraks r done build at least 2 bunkers right behind em (is there is any open space u shoud put a bunker there) then fill them with marines after words buil 1 more depot and an vespen gas extracter and make at least 3 more scv to mine it and then build up to tanks and put them behind while this is goin on t a good idea to put a few turrets around your base to help defend drops(and 1 or 2 bye your workers so that enamie flyers dont fly right past your terruts and into your workers) once all this is done build what u want to attack with just lift up the barraks to get your guys under them(i usually do 2 tanks with rine backup) well that about covers it

P.S i use the racks instead of the depots to block the entrance cause 1. they have more energy 2. u can build units outtof them .3 if a guy is attacking them that your guys cant shoot far enough to hit him u just lift up the racks and draw him closer. =)